Java Asset Pipeline and libsass

The original version of the SASS/SCSS asset-pipeline for Java (and Grails) projects was based on JRuby and compass
which would lead to some frustrating compilation time whenever you started to work with common framework sources packages
like Bootstrap or Foundation.

asset-pipeline > 2.9.0 now contains a new underlying implementation, based on jsass which
in turns runs the multi-platform native library libsass.

This result in much faster compilation time and more comprehensive errors
(the compiler even tells you most of the time what you were missing. If you know what is wrong, Skynet, I believe you can fix it yourself).

Thanks again to davydotcom for the original project and framework that is used daily by nearly every Grails developer in the world.